Answer:
Step-by-step explanation:
Sample variance when large number of samples are drawn we have tend to become a normal distribution.
Variance of the sample is different since variance
Var(x) = E(x^2)-{E(x)}^2
is the formula used for finding the variance of any sample.
But sampling distribution of variance requires repeating this process with the different samples several times.
So option A is not right
B is also not correct, C is wrong
D.The sampling distribution of the mean requires multiple samples to be compared. However, in this situation you are looking for the variance, so finding the sample variance is the same as investigating the sampling distribution of the variance.
is correct
Answer:
52 miles per hour
Step-by-step explanation:
117/2.25=52
Answer:
74.5 and 64.5
Step-by-step explanation:
Women midpoints:
54.5 - 0%
64.5 - 30%
74.5 - 35% (most pulse rates from women)
84.5 - 29%
94.5 - 2%
104.5 - 2%
114.5 - 0%
124.5 - 2%
Men midpoints:
0 - 0%
54.5 - 15%
64.5 - 43% (most pulse rates from men)
74.5 - 20%
84.5 - 20%
94.5 - 2%
104.5 - 0%
Maybe ask google for help
Answer:
b) 4.5 hours
Step-by-step explanation:
The first cyclist has a 3-hour head start. At 6 mph, that is an 18-mile head start.
The second cyclist gains on the first at the rate of (10 -6) = 4 mph, so will make up that 18 miles in ...
(18 mi)/(4 mi/h) = 4.5 h
The second cyclist will catch up with the first after 4.5 hours from the time the second cyclist started.